Lambeosaurus

Huge Beast (Dinosaur), Unaligned

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Armor Class 13 (thick hide)

Hit Points 115 (10d12 + 50)

Speed 40 ft.

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STR	DEX	CON	INT	WIS	CHA
20 (+5)	10 (+0)	20 (+5)	2 (–4)	12 (+1)	8 (–1)

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Saving Throws Con +8

Skills Perception +3

Senses passive Perception 13

Languages —

Challenge 4 (1,100 XP)

Proficiency Bonus +2

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Traits

Crest Resonance

The Lambeosaurus’ hollow crest produces powerful low-frequency sound. Its Thunderous Call ability has advantage against creatures within 10 feet of a solid surface (cliffs, buildings, stone walls, dense trees) because of amplified reverberation.

Stampede Instinct

If the Lambeosaurus moves at least 20 feet straight toward a creature and hits with Goring Slam, the target must succeed on a DC 15 Strength saving throw or be knocked prone.
If the target is prone, the Lambeosaurus may make a Trample attack as a bonus action.

Herd Alertness

While within 60 feet of another Lambeosaurus, it has advantage on Wisdom (Perception) checks and Dexterity saving throws.

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Actions

Multiattack

The Lambeosaurus makes two attacks: one with Goring Slam and one with Tail Lash.

Goring Slam

Melee Weapon Attack: +7 to hit, reach 10 ft., one target.
Hit: 17 (2d10 + 5) bludgeoning damage.

Tail Lash

Melee Weapon Attack: +7 to hit, reach 15 ft., one target.
Hit: 14 (2d8 + 5) bludgeoning damage, and the target must make a DC 15 Strength saving throw or be pushed 10 feet.

Thunderous Call (Recharge 5–6)

The Lambeosaurus unleashes a deep, resonant bellow.
Each creature of its choice within 30 ft. must make a DC 14 Constitution saving throw, taking 21 (6d6) thunder damage and becoming deafened until the end of its next turn on a failure; half damage and no deafness on success.

If the Lambeosaurus is adjacent to a cliff, canyon wall, fortress wall, or similar surface, the thunder damage increases to 28 (8d6).

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Reactions

Herd Rally

When the Lambeosaurus takes damage, it emits a sharp alarm call.
One allied beast or dinosaur within 60 feet can use its reaction to move up to half its speed toward the attacker without provoking opportunity attacks.

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Combat Tactics

Although peaceful grazers, Lambeosaurs become highly dangerous when threatened:

• Starts combat with Thunderous Call, softening attackers at range.
• Charges at vulnerable targets to trigger Stampede Instinct and knock enemies prone.
• Uses Tail Lash to keep foes from flanking or to shove them into hazards.
• Frequently fights as a unit, with Herd Rally enabling herd members to reposition quickly.
• Tries to escape once the herd has an opening, fighting only to clear a path.

In the wild, a Lambeosaurus is less a predator and more a living avalanche—unstoppable once it builds momentum.

Lambeosaurus

This towering duck-billed dinosaur moves in disciplined herds, its resonant crest producing booming calls that echo across ancient wetlands.

Lambeosaurus                CR 6
XP 2,400
N Huge animal
Init +1; Senses low-light vision, scent; Perception +12

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DEFENSE

AC 19, touch 9, flat-footed 18 (–2 size, +1 Dex, +10 natural)
hp 85 (9d8+45)
Fort +11, Ref +7, Will +5
Defensive Abilities powerful frame
Immune none
Resist none

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OFFENSE

Speed 40 ft.
Melee gore +15 (2d8+10), tail slap +10 (2d6+5)
Space 15 ft.; Reach 10 ft. (15 ft. with tail)

Special Attacks

Stampede Charge, Thunderous Bellow (Ex), Trample (2d8+10, DC 23)

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STATISTICS

Str 30, Dex 13, Con 22, Int 1, Wis 14, Cha 9
Base Atk +6; CMB +18; CMD 29 (33 vs. trip)
Feats Endurance, Great Fortitude, Improved Bull Rush, Iron Will, Run, Toughness
Skills Perception +12
Racial Modifiers +4 Perception
Languages —
SQ herd awareness

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ECOLOGY

Environment warm plains, marshes, river valleys
Organization solitary, pair, or herd (4–20)
Treasure none

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SPECIAL ABILITIES

Herd Awareness (Ex)

A Lambeosaurus gains a +2 bonus on Perception checks and Reflex saves when within 60 feet of at least one other Lambeosaurus.

Stampede Charge (Ex)

If a Lambeosaurus moves at least 20 feet in a straight line and hits with its gore attack, the target must succeed at a DC 23 Reflex save or be knocked prone.
A prone creature is automatically hit by the Lambeosaurus’s trample attack.

Thunderous Bellow (Ex)

Once every 1d4 rounds, the Lambeosaurus unleashes a resonant, low-frequency roar through its hollow crest.
Creatures within 40 feet must succeed at a DC 19 Fortitude save or take 4d6 sonic damage and be deafened for 1 round; those adjacent to a cliff, canyon wall, or other large surface take +2d6 sonic damage due to reverberation.
A successful save halves the damage and negates the deafness.

Trample (Ex)

Reflex DC 23 halves damage. The save DC is Strength-based.

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TACTICS

Before Combat

A Lambeosaurus relies on vigilance and herd structure. It flees unless cornered or defending young. Herd members position themselves to encircle threats when multiple are present.

During Combat

The dinosaur begins with Thunderous Bellow to disrupt enemies at range, then attempts a Stampede Charge to knock foes prone. A prone enemy is immediately targeted with Trample.
It uses its tail to keep creatures at distance or shove them into hazards such as mud, water, or dense underbrush.

Morale

A Lambeosaurus fights only long enough to open a path to safety.
If reduced to 25 hp or fewer, it withdraws; herds retreat together in a coordinated stampede.

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DESCRIPTION

A Lambeosaurus stands 20 feet tall at the crest and measures nearly 50 feet from nose to tail. Its signature, axe-shaped crest amplifies deep calls used for communication, warning, and long-distance coordination. Peaceful yet formidable, these herbivores traverse floodplains in migratory herds that shake the earth with every step.

Lambeosaurus

This large reptilian quadruped has a stiff tail, a duck-like beak and a plow- shaped crest on the top of its head.

Originally Posted by Shade of the En World forums.

On this Thread

Lambeosaurs are a species of hardrosaur that lives in large herds.

A lambeosaur is a very large animal, smaller than its relative the anatotitan, but still averaging over 30 feet long. It still is a common prey item for many carnivorous dinosaurs, but lambeosaurs live in large herds to protect themselves from danger. Each herd has a distant relationship with other nearby herds, and their crests act as powerful amplifiers for their hooting cries. The distress calls of a lambeosaur can be heard from almost a mile away, and if a distress call is given, other herds in earshot flee as rapidly as possible.

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Dinosaur, Lambeosaurus
Huge animal
Hit Dice	10d8+50 (95 hp)
Initiative	+0
Speed	40 ft. (8 squares)
Armor Class	14 (-2 size, +6 natural), touch 8, flat-footed 14
Base Attack/Grapple	+7/+21
Attack	Tail slam +11 melee (1d8+9)
Full Attack	Tail slam +11 melee (1d8+9)
Space/Reach	15 ft./10 ft.
Special Attacks	Trample 2d10+9
Special Qualities	Low-Light Vision, Scent
Saves	Fort +17, Ref +7, Will +5
Abilities	Strength 23, Dexterity 11, Constitution 20, Intelligence 1, Wisdom 12, Charisma 7
Skills	Listen+12, Spot +12, Swim +9
Feats	Alertness, Endurance, Great Fortitude, Run
Environment	Temperate and warm plains and hills
Organization	Solitary, pair or herd (8-40)
Challenge Rating	6
Treasure	None
Alignment	Always neutral
Advancement	11-20 HD (Huge), 21-30 HD (Gargantuan)
Level Adjustment	–

COMBAT

Lambeosaurs shy away from combat unless they or their offspring are threatened. If so, they fight using their powerful tails.

Trample (Ex): A lambeosaurus can literally run over any creatures in its way that are of Large or smaller size. Creatures trampled must make a Reflex save (DC 21 half) or take 2d10+9 damage. The save DC is Strength-based.

Skills: Lambeosaurs have a +4 racial bonus on Listen and Spot checks.

Originally appeared in Monster Manual (1977).